Out with the Small Block and in with the RB. What do I need?

Motor mounts
Big block bellhousing
Bigger torsion bars
Rear axle???
Radiator
Fan clearance WILL be an issue and seems every solution is different. What works for some doesn't work for others.
Good list start. Allow me to make my list from my conversion of a /6 - 400.

Schumacher Creative Serives /6 - B/RB swap kit. Also, I purchased the torque arm/engine strap.
Bigger aluminum radiator purchased from Summit
Cables from Lokar (no stock parts to reuse)
Shorter Hayden viscous unit with use of mechanical fan. (Not yet on the car, electric fan is in use for now.)

Shorten driveshaft
(This may not be needed if you had a 727/4spd in the car beforehand and your not changing the rear.)
Swap whimpy 7-1/4 for a 8-3/4
S/S springs

Still in use without issue are the OE
Torsion bars
4 wheel 10 inch drums rebuilt

Small parts;

Electrical wires, tape, connectors for lengthening and shortening wires under the hood.

New water temp, oil pressure sending units.

I could lengthen the list except that would depend on what your doing with the car. Drag, driver, auto cross?